EP0943375A1 - Verfahren und Einrichtung zur Bodensanierung - Google Patents

Verfahren und Einrichtung zur Bodensanierung Download PDF

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Publication number
EP0943375A1
EP0943375A1 EP97203405A EP97203405A EP0943375A1 EP 0943375 A1 EP0943375 A1 EP 0943375A1 EP 97203405 A EP97203405 A EP 97203405A EP 97203405 A EP97203405 A EP 97203405A EP 0943375 A1 EP0943375 A1 EP 0943375A1
Authority
EP
European Patent Office
Prior art keywords
container
well
liquid
opening
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97203405A
Other languages
English (en)
French (fr)
Inventor
Ilya Mackelbert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SARPI Remediation NV
Original Assignee
Watco Remediation Services NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Watco Remediation Services NV filed Critical Watco Remediation Services NV
Priority to EP97203405A priority Critical patent/EP0943375A1/de
Publication of EP0943375A1 publication Critical patent/EP0943375A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/34—Arrangements for separating materials produced by the well
    • E21B43/38—Arrangements for separating materials produced by the well in the well
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/007—Reclamation of contaminated soil by removing contaminants floating on the water table
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C2101/00—In situ

Definitions

  • the subject of the present invention is a method for cleaning up soil contaminated with liquid contaminants of density less than 1 and forming at least partially a distinct phase with respect to water, in which we plan in the soil to be sanitized a series of separate wells capable of collecting water and products liquid contaminants forming a phase on the surface of the collected water.
  • the method according to the invention aims to remedy these drawbacks and relates to a process consuming a minimum amount of energy for pumping water and liquid contaminants.
  • water is pumped out of the well to bring the phase of liquid contaminants at the opening of the container placed in said well.
  • the container or a part associated therewith to bring the opening of the container to the level of the phase liquid contaminants.
  • a volume of liquid is pumped out of the container, while as soon as the opening is no longer substantially immersed in water, stop pumping liquid out of the container.
  • water is introduced into the well.
  • the well is allowed to fill with water and liquid contaminants from the soil to be remediated.
  • the opening of the container is located at a distance of at least 50 cm from the bottom of the well.
  • the opening of the container is located at most 100 cm from the bottom of the well.
  • wells are advantageously formed having a liquid-permeable side wall.
  • the bottom of the wells is provided with an impermeable tank and / or with a tank the horizontal cross section of which decreases the closer we get to the bottom thereof.
  • control unit includes a timer or timer stopping pumping of liquid out of the container after a period of time determined.
  • control unit provides the injection of water by a piping opening into the well when it controls the pumping of liquid out of the container.
  • the installation comprises at least one vacuum pump connected by a pipe to each of the containers to create a vacuum inside the container and a suction of liquid into the container through the lower opening of this one.
  • control unit comprises a timer or timer for pumping water out of the well intermittently.
  • the control unit 16 includes a timer or timer 17 stopping the pumping liquid out of the container after a specified period of time.
  • FIGS. 2 and 3 show in section the bottom of a well 2 provided with a container 1, while Figure 4 is a perspective view of the container 1.
  • the well 1 is formed by a longitudinal hole whose side wall 100 is formed by a permeable sheath liquids.
  • the bottom of the well is advantageously waterproof and is formed by a bowl 101.
  • the cross section of the part of the well adjacent to its bottom 102 decreases the closer we get to it. This shape is advantageous because the bottom of the well reaches the level more quickly of the opening of the container 1.
  • the lower opening O of the container made of material plastic (PVC, polycarbonate, ...) is for example 75 cm from the bottom of the well.
  • the container 1 defines a substantially cylindrical chamber 103 extended by a duct 104 of semi-circular section.
  • the lower part of a pipe 8 for the pumping of liquid out of the well passes through the chamber 103 and the conduit 104.
  • the free end of line 8 is adjacent to the bottom of the well, but is preferably located at a sufficient distance from it to prevent this end is immersed in a deposit of solid particles.
  • This free end of the pipe is located below the opening O of the container.
  • the vertical distance D between the opening O of the container 1 and the opening of the end free of line 8 is at least 10 cm (for example between 20 and 50 cm).
  • the upper part of the container is provided with a nozzle 105 forming a passage between the chamber 103 and the piping 5 for sucking out of the container of the liquids.
  • the probe high 10 determines the presence of contaminating liquids in chamber 103 or more exactly when the chamber is substantially completely filled with contaminating liquids.
  • the low probe is located near the opening O of the container 1.
  • the probes 10, 11 are carried by two trays 110, 111 pierced with a hole.
  • the lower plate 111 also carries the end of an electrical conductor 112 intended to form a mass or a reference for the high probe 10.
  • the information (electrical pulses) from the probes is sent by cables 116,117 to the control unit 16, the latter also being connected by a cable 118 to earth 112.
  • a cover 119 makes it possible to close the space or volume located between the two trays 110,111. This cover is by example fixed by means of screws 120.
  • FIG. 1 allows the implementation of a process remediation of soil contaminated with liquid density contaminating products less than 1 and at least partially forming a distinct phase with respect to water, in which a series of separate wells suitable for collect water and liquid contaminants forming a phase in the surface of the collected water, in which is placed in each of said wells a container having a lower end an upper end and a adjacent opening of its downward facing end, in which said filling is filled container by means of water, in which the opening of each container is brought to the level of the phase of liquid contaminants or in which the phase of liquid liquid contaminants at the opening of each container so that as this phase rises in the container towards its upper end, in which when the container contains a determined volume of liquid contaminants, at least partially pump this volume out of the container.
  • Figures 5 to 9 show process steps for a container 1 placed in a well 2.
  • the well 2 has a substantially circular cross section S with a diameter of between 5 and 15 cm, for example around 10 cm.
  • the container has a maximum cross section SM less than the cross section of the well so that it can slide into said well.
  • This section SM is advantageously circular and advantageously has a diameter such that a spacing E of 0.5 to 1.5 cm is created between the substantially cylindrical part of the container 1 and the internal wall of the well 2.
  • Well 1 is refilled and the steps of pumping water out of the well and transferring liquid contaminants into well 2 are repeated until the probe 10 detects liquid contaminants, that is to say a volume Vmax of liquid contaminants in the container 1. (FIG. 8) At this time, the phase of liquid contaminants is pumped out of the container 1 using the pump 4 and the pipe 5 to bring it to a tank 31. During of this pumping, water is sucked into the container 1 through its opening O. To avoid that the opening O is no longer immersed in water, it is advantageous during this pumping step to inject through the line 13 of water in the well.
  • the flow rate of water injected advantageously corresponds substantially to the flow rate of liquid contaminants pumped out of the container 1, so as to ensure that the well 2 contains a quantity of water sufficient to replace the volume of liquid contaminants pumped into the container.
  • the cycle can then continue with steps for filling the well with liquids passing through the side wall of well 2, for draining water out of the well, for transfer of liquid contaminants into the container, etc.
  • the control device 16 controls for the various containers 1 placed in the well 2, (and this advantageously independently) the pumping steps of water out of the wells, draining liquid contaminants out of the containers with preferably injection of water into the well.
  • the pipe 8 for sucking water out of the well is provided at its free end with a non-return valve, this valve making it possible to ensure that the conduit 8 does not discharge by itself into the well during a stop of the pump 7.
  • the pipe 5 is advantageously provided with the near its adjacent end of container 1, a non-return valve avoiding passage of liquid from the pipe to the container 1.
  • Such non-return valves keep effortlessly a column of liquid in the pipes and therefore to facilitate the operation of pumps 4 and 7.
  • the pumps are advantageously placed in surface, so as to facilitate their maintenance and so as to avoid having to immerse rotating mechanical parts.
  • opening O for the suction of liquid contaminants with a density lower than that water is extended by a conduit 40 associated with a movable part 41 so as to be able position the level of the suction opening in the well.
  • the displacement of the mobile part is controlled for example by a jack 42 controlled by the unit control 16.
  • the sensor 11 is advantageously mounted on the movable tube 41. This embodiment is advantageous because it allows to maintain, at least for a period of time, the opening in the vicinity of the liquid contaminant phase without pumping water out of the well and despite the natural filling of the well with water and other liquids from the ground.
  • FIG. 1 makes it possible to remediate soils polluted by hydrocarbons, such as fuel oil, petroleum, etc., by other liquid contaminants of density less than 1 and preferably substantially immiscible with water so as to ability to form a phase distinct from an aqueous phase or a phase rich in liquid contaminants.
  • hydrocarbons such as fuel oil, petroleum, etc.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Soil Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Processing Of Solid Wastes (AREA)
EP97203405A 1997-11-03 1997-11-03 Verfahren und Einrichtung zur Bodensanierung Withdrawn EP0943375A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97203405A EP0943375A1 (de) 1997-11-03 1997-11-03 Verfahren und Einrichtung zur Bodensanierung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97203405A EP0943375A1 (de) 1997-11-03 1997-11-03 Verfahren und Einrichtung zur Bodensanierung

Publications (1)

Publication Number Publication Date
EP0943375A1 true EP0943375A1 (de) 1999-09-22

Family

ID=8228897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97203405A Withdrawn EP0943375A1 (de) 1997-11-03 1997-11-03 Verfahren und Einrichtung zur Bodensanierung

Country Status (1)

Country Link
EP (1) EP0943375A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT379120B (de) * 1983-05-04 1985-11-25 Gurschner Maria Sanierbrunnen-anlage
US4625801A (en) * 1983-07-13 1986-12-02 Pump Engineer Associates, Inc. Methods and apparatus for recovery of hydrocarbons from underground water tables
US4746423A (en) * 1986-09-15 1988-05-24 R. E. Wright Associates In-well pump skimmer
US5128052A (en) * 1991-01-15 1992-07-07 Bullock Philip W Wellbore liquid recovery apparatus and method
US5154538A (en) * 1989-03-22 1992-10-13 Preussag Aktiengesellschaft Method and apparatus for removing a liquid phase floating on a surface of groundwater
US5207897A (en) * 1991-05-20 1993-05-04 Baird William E Floating hydrocarbons separator pump with buoyant housing and two-chamber vertically moveable member

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT379120B (de) * 1983-05-04 1985-11-25 Gurschner Maria Sanierbrunnen-anlage
US4625801A (en) * 1983-07-13 1986-12-02 Pump Engineer Associates, Inc. Methods and apparatus for recovery of hydrocarbons from underground water tables
US4746423A (en) * 1986-09-15 1988-05-24 R. E. Wright Associates In-well pump skimmer
US5154538A (en) * 1989-03-22 1992-10-13 Preussag Aktiengesellschaft Method and apparatus for removing a liquid phase floating on a surface of groundwater
US5128052A (en) * 1991-01-15 1992-07-07 Bullock Philip W Wellbore liquid recovery apparatus and method
US5207897A (en) * 1991-05-20 1993-05-04 Baird William E Floating hydrocarbons separator pump with buoyant housing and two-chamber vertically moveable member

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